Tractor-truck.



v. A. BOKER.

TRACTOR TRUCK.

APPLICATION man OCT. 18, 1915.

1,221,13 7 Patented Apr. 3, 1917.

2 SHEETS-SHEET V. A. BOKER.

TRACTOR TRUCK.

APPLICATION men OCT. 18. ms.

PI, 3 2 SHEETS-SH 2' spect to the tractor frame. Such reverse adjustments, howevenwili throw th frame 1 into a more or less inciined position in a directlon from front to rear. Hence, when it is desired to keep the main frame 1 in suhstantially erfect horizontal adjustmeut,the

traction w eel should he arranged to run in a furrow, and for example, when plowing, will he dropped down, and the traction wheelwhich is to run upon the nnplowed vound would simply be so adjusted or left in such adjustment, as to keep the tractor frame horizontal, both in a transverse direction and in a, longitudinal direction.

In the accompanying drawings, the two traction wheels are shown as located in axial alinement, but the construction described permits the one traction wheei to be located ahead of the other and this would be accomplished either by making the one radius arm longer than the other, or by throwing the one radius arm rearward and the other forward. In the construction illustrated, the so-called radius arms are formed by the rods 8 and heads 9, to the ends of whichv arms;v the segmental bearing plates 7 are rigidly attached. Movement of the so-called bearing plates concentric to the driving counter shaft 12 is, of course, of the utmost importance when thetransmission is made I I through sprockets'and chains, but it will also be} important when transmitting through gears and shafts.

memes What Iclaim is: i l

1. In a truck, the combination with a truck frame, of a radius arm pivoted to said truck frame and-carrying a bearing plate at its freeend, sziid hearing plate, at its outer edge having a Worm gear segment, and an ad usting worm journaled in a hearing on said frame and engaging the worm gear segment of said bearing plate for adjusting the Vssme vertically, a clamp for securing said frame and bearing plate in different set adjustincnts, and a wheel journaled to said bearing plate.

2, In a truck, the combination with a truck frame, of. a. radius arm pivoted to said truck frame and carrying a bearing plate at its free end, the said bearing plate, at its outer.

VITUS A. BOKER.

Witnesses:

CLARA Dnamnss'r, Bnnmou G. WHEELER, 

